The length of a scale is 30 cm and it's thickness is 5mm. What is the ratio of the
thickness of the scale of that of it's length?

Length of a scale = 30 cm

Thickness of a scale = 5mm

To find their ratio let us first make their units equal .

30 cm = 30 × 100 mm = 300 mm

Length of a scale = 300 mm

Thickness of a scale = 5 mm

Ratio of thickness of scale to length of scale =

= 5 : 300 = 5/300

Let us simplify 5/300 by dividing it's numerator and denominator by 5 .

= 5 ÷ 5 / 300 ÷ 5

= 1/60

= 1 : 60 mm

Therefore , the ratio of the thickness of scale to the length of scale is 1 : 60 mm .

step-by-step explanation: